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Volume 43 Issue S2
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YI Shun, YUE Ke-dong, CHEN Jian, HUANG Jue-hao, LI Jian-bin, QIU Yue-feng, TIAN Ning. Risk analysis of two-layer clay slopes considering spatial variability of shear strength[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(S2): 112-116. DOI: 10.11779/CJGE2021S2027
Citation: YI Shun, YUE Ke-dong, CHEN Jian, HUANG Jue-hao, LI Jian-bin, QIU Yue-feng, TIAN Ning. Risk analysis of two-layer clay slopes considering spatial variability of shear strength[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(S2): 112-116. DOI: 10.11779/CJGE2021S2027
shu

Risk analysis of two-layer clay slopes considering spatial variability of shear strength

  • 1.

    State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China

  • 2.

    University of Chinese Academy of Sciences, Beijing 100049, China

  • 3.

    Hubei Key Laboratory of Geo-Environmental Engineering, Wuhan 430071, China

  • 4.

    The Soft Soil Research Center in Ningbo University of Technology, State Key Laboratory of Geomechanics and Geotechnical Engineering, Ningbo 315211, China

  • 5.

    Changjiang Institute of Survey, Planning Design and Research Co., Ltd., Wuhan 430010, China

  • 6.

    School of Civil Engineering, Guangzhou University, Guangzhou 510006, China

  • 7.

    Power China Zhongnan Engineering Corporation limited, Changsha 410014, China

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  • Received Date: August 12, 2021
  • Available Online: December 05, 2022
    Graphical Abstract
    • Abstract
  • Anisotropy exists in the spatial variability of soil parameters. Therefore, it is rational to indicate the spatial distribution of slope parameters using anisotropy random fields. Based on the anisotropic random field of shear strength of soil for a two-layer slope, the effects of vertical scales of fluctuation, horizontal scales of fluctuation and coefficient of variation (COV) of soil parameters on the slope failure probability, instability modes and risk assessments are studied. The main conclusions are drawn as follows: with the increase of COV, the risk of slope failure gradually increases. In low-variability soils, there is almost no risks of slope failure. On the whole, the failure probability of slope is consistent with the risk of failure as COV increases. The deep-layer slop mode accounts for a large proportion, but with the increase of COV, the deep-layer slope mode gradually becomes the shallow slope one. When the scale of fluctuation (including horizontal and vertical) increases, the failure probability of slope and risks increase accordingly. However, when the scale of fluctuation exceed a particular size, which is related to the size of the slope, the increasing amplitude of failure probability and risks slows down as the scale of fluctuation increases.
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    • References (13)
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